Improvement of Motor Performance By Applying 6-Sigma (Dmadv)

George May, Kassir, Shatha Mouayad
2015 Eng. &Tech.Journal   unpublished
Highly competitive markets justify the use of advanced technologies and methods to improve product's quality and sales, which are the survival of any organization involved in business to be adaptive, proactive, and responsive to changes and has the capability to provide customer expectations. The success of products depends on how well they meet customer requirements. In order to achieve competition in Iraqi market, and to get high quality performance, Six Sigma has been applied in the "State
more » ... mpany for Electrical Industries" on motor of (1/4) HP. It is important to evaluate product strengths and weaknesses among competitive products available in Iraqi market to get the needed specifications to implement it in QFD (HOQ). The calculations were carried out by using "sigma xl version 6.2" program. Six sigma methodology: DMADV was adopted. Quality Function Deployment (QFD) was applied to improve motor performance. Thirty questionnaires were distributed and collected back to build QFD Matrix which determines four problematic issues with high scores: starting current, losses, coil winding, and rotor dimensions which indicates the need to resolve. Referring to QFD results which indicate the starting current is one of the main problems of motor performance, the researchers suggest motor redesign by adding "Soft Starting Circuit" to resolve this problem. Starting current for motor was measured and found to be 5.2 amp, while it decreased to 3.2 amp after redesign. Motor performance will be improved, cause the reduction of losses from 312 to 128 watt.